method for the preparation of substituted pyridinefosfonaten and fosfonothioaten and pharmaceutical preparations containing these compounds as active components include.

摘要

1471822 Pesticidal phosphorus-containing pyridine derivatives DOW CHEMICAL CO 27 March 1975 [1 April 1974] 12957/75 Heading C3P Novel compounds of Formula I where Y is O or S, R is phenyl optionally substituted by one or more of Br, Cl and F atoms and C 1 -C 4 alkyl radicals, RSP1/SP is C 1 -C 4 alkyl and XSP1/SP, XSP2/SP and XSP3/SP are Br, Cl, F, CF 3 or H, provided that at least one of XSP1/SP, XSP2/SP and XSP3/SP is other than H and provided that, if XSP1/SP is H and XSP2/SP is Cl or if both XSP1/SP and XSP2/SP are Cl, then XSP3/SP is other than Cl, may be prepared by reacting a compound of Formula II with a pyridinol of Formula III or an alkali metal salt thereof. A small amount of mercurous chloride or methylbenzylammonium chloride may be used as catalyst. The compounds of Formula I may be used to control cotton leafworm larvae and may be used as active ingredients in conventional pesticidal compositions.